i hear water in under my dash?

Question

in my grand marque under my hood i occasionally hear water swishing it sounds like its involved in my heating or cooling. what could this be?

Answer 1

you first need to check the drain tube on the a/c - heater box . the drain tube is located on the firewall under the hood, if it is plugged, the condensation off the evaporator core will be trapped in the box and it if gets to full you will sometimes feel droplets of water coming through the air ducts. take a straw or a small stick and push it in the drain tube about 2 inches to open the drain do not force any sharp objects into the drain tube, you might hit the evaporator or heater core and cause more problems. if the drain tube is open you might look at the cowling, it is the part behind the hood that has the slits in it, in front of the windshield where the fresh air for passenger compartment enters the car, there may be a crack in it, and it will let the cavity of the cowling fill up with water during a heavy rain

Answer 2

Sounds like you have an air pocket in your heater core. If you have had any work done, like a radiator, water pump, radiator hose, or heater hose replaced, the mechanic may not have gotten the air out of the system. Check your coolant level (read owners manual if you do not know how to do this, could cause severe burns) fill if needed, Get car to operating temp., turn the temp control on your dash all the way to hot (the fan does need to be on on some vehicles), and rev the engine to 2500 to 3000 RPM to get the air pocket out.

Answer 3

I could only think --as you have--that it is the water running through your heater hoses.Try turning your heater valve off and see if you can still hear it. If there is air in the water causing this sound it could be a sign that you have a leaky head gasket.This may only be happening when the car heats up,and you may be able to catch it before its too late by checking that all your head bolts are tight.Also sometimes if you mix coolant brands, they can react with each other,and cause bubbles.--i think its called cavitating or something simular.Check that your engine is holding pressure,by turning it off when it is hot,then after a few minutes-squeeze the radiator hose --it should stay tight -if it doesnt you are loosing pressure somewhere.-good luck.

Answer 4

Sounds like you have air in your heater core. You probably have a coolant leak. Check your radiator coolant level immediately. Look for hoses that have a copper dirt or dust type residue. This will indicate a leak under the hood. Check the carpet under the glove box to make sure it's not wet. Could be leaking at the heater core. Definitely sounds like you have a leak. Find it and fix it so you don't overheat your car. Good luck.

Answer 5

If it is heard when you turn off the engine, and coming from the A/C case it is perfectly normal. The evaporator coil turns the refrigerant in your A/C system to steam from the heat absorbed from the passenger compartment. The loss of pressure when you turn off the vehicle (ie: the compressor stops running) causes the liquid refrigerant to drain back into the evaporator, causing a faint gurgling noise. It is nothing to be concerned about.

Answer 6

it IS water. i dealt with this in my ford ranger.

heres the problem-

on my truck, where the wipers attach, there is a drain on each side, underneath where you cant really see. leaves and pine needles worked their way in there and eventually plugged both sides of that drain. when it rained, water would rise, and eventually enter ducts of where the heater draws in air. when that happens you have water slushing around in there and interfering with your heater and ac. if not resolved you'll have serious electrical problems.

Answer 7

Used car from New Orleans?

Answer 8

That's funny